Intermittent problem viewing pages with Google Chrome

Hello

Over the past few weeks, I have been experiencing intermittent problems with viewing particular pages on my WordPress site, especially when using Google Chrome. I am copying the code which appears instead of the usual page content with the expectation that someone could kindly shed light on what may going wrong and how to fix it. An IT person informed me that the problem was caused by the plug-in Yay Images but I have uninstalled this plug-in and the problem is still there.

Many thanks!

Here is the code:

<?php
/**
* Front to the WordPress application. This file doesn’t do anything, but loads
* wp-blog-header.php which does and tells WordPress to load the theme.
*
* @package WordPress
*/

/**
* Tells WordPress to load the WordPress theme and output it.
*
* @var bool
*/
define(‘WP_USE_THEMES’, true);

/** Loads the WordPress Environment and Template */
require( dirname( __FILE__ ) . ‘/wp-blog-header.php’ );